Lenovo ThinkPad X220 4298 User Manual page 142

9. Release the palm rest from the computer. Now the palm rest has been removed.
Installing the palm rest
1. Attach the palm rest, making sure the latches near the top left and right edges of the palm rest are secure.
2. Push the front side of the palm rest until it clicks into place.
3. Attach the flip-lock ZIF connector
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1 , then push the palm rest cable 2 .